Scaffolds



Jan. 21, 1958 o. H. HUBER 2,820,678 l scAFFoLDs Filed Jan. 5.1956

Wg. A. 22 v M'WWy ATTORNEYS 24 l 2 v i INVENToR. i@ 51,/ 5 OSCAR H.UBL-R Unite i 2 claims. (ci. san-2) This invention relates toimprovements in adjustable scatfolds and trestles therefor.

In the building of houses, especially residences, the walls are usuallyso high that it becomes necessary to use a scaffolding after the wallsreach such a height that the workman cant reach from a platformsupported on trestles alone.

It is the object of this invention to produce a scaiolding formed inpart by sawhorses or trestles, the latter being of such constructionthat it can be used by itself or as an element of the scaioldcombination.

A further object is to produce a scaold that can be adjusted in heightas the wall increases in height.

The above and other objects that may become apparent as the descriptionproceeds or to which attention may be hereinafter directed are attainedby means of a construction and an arrangement of parts that will now bedescribed in detail, for which purpose reference will be had to theaccompanying drawing in which the invention has been illustrated, and inwhich:

Figure 1 is a side elevational View of the scaffold;

Figure 2 is an elevational view looking in the direction of arrow 2 inFigure l;

Figure 3 is a view, partly in section, taken on line 3 3 Figure 1;

Figure 4 is a View, partly in section, taken on line 4 4 Figure 1;

Figure 5 is a section taken on line 5-5 Figure 4;

Figure 6 is a section taken on line 6--6 Figure 4; and

Figure 7 is a side elevational view of the lower end of the shortervertical member at the point designated by arrow 7 in Figure 1.

Referring now to the drawing, reference numeral 10 designates the wallunder construction, which, for the purpose of this description, will beconsidered as being formed from brick, and numeral 11 the surface of theground. Reference numeral 12 designates the trestle which forms the baseof the scaffold and which consists of a pipe 13 the ends of which aresupported on legs 14 as shown. Welded to the ends of pipe 13 are shortsections of pipe 15 that function as guides for the vertical scaffoldmembers 16 and 17 of the superstructure; these members which are usuallypipe, are provided with vertically spaced openings 18 for the receptionof pins 19 which rest on the tops of guide 15 as shown in Figures l, 2and 3. Welded to the upper end of pipe 16 is an arm 20 that projectslaterally as shown in Figure 1 and terminates in a downwardly extendingpipe 21 whose lower end terminates in two centering members 22. A rod orsmaller pipe 23 telescopes in pipe 21, as shown most clearly in Figures1 and 4; and is provided with spaced openings 24 for the reception ofpin 25. The lower end of rod 23 is provided with two oppositelypositioned lingers 26 that embrace pipe 13 as shown in Figure 4. Thelower end of rod 23 may terminate in a small pin 27 that enters anopening in pipe 13 and serves to posi- States Patent O pic tivelyposition the lower end of rod 23 to assure that it will not slide alongpipe 13. Extending laterally from the top of pipe 17 is an arm 2S thatterminates in a vertical pipe 29 whose lower end is provided with a plug30 that enters the upper end of pipe 21, as shown in Figure l. Twoscaffold units like those shown in Figures 1 and 2 are spaced apart andplanks 31 are supported on arm 20 and form a platform for the workman tostand on. Planks 32 form a similar platform on top of pipes arm 2S. Themortar 33 and bricks or blocks 34 are supported on planks 31, asindicated in Figure 2.

Attention is called to the fact that the parts designated by numerals17, 27 and 28 can be removed leaving the adjustable support comprisingmembers 16, 20, 21 and 23, in which case planks 32 can be positioned ontop of pipes 13 as indicated by broken lines in Figure 1. Planks 31 canthen support the mortar and the bricks and/or blocks. Since rod 23 restson pipe 13 at its middle point the parts are reversible, so that themortar and bricks may always be positioned in the proper relation to thework.

Attention is directed to the vertical adjustments that have beenprovided and to the trestle which forms an element of the combination.The trestle is provided with the tubular guides 15 which are veryimportant in the scaffold arrangement and the trestle as shown is,therefore, a novel subcombinations element.

What is claimed as new is:

l. An adjustable scaffold comprising: a lower horizontal element havingspaced pairs of legs depending therefrom supporting it in spacedrelation above the ground, vertical front and rear tubular elementsdepending from the lower horizontal element in horizontally Ispacedparallel relation, front and rear upright elements mounted within thefront and rear tubular elements respectively for vertical adjustmentrelative thereto, an intermediate upright element formed in threesections and arranged in spaced parallel relation between the front andrear upright elements, the lower section of the intermediate uprightcomprising a rod-like member detachably connected to the lowerhorizontal element between the ends thereof, the intermediate sectioncomprising a tubular member mounted on the rod-like member for verticaladjustment relative thereto, and the upper section comprising a tubularelement having a pin in the lower end thereof detachably connected intothe upper end of the intermediate section, an intermediate horizontalelement connected between the front upright and the intermediate sectionof the intermediate upright, and an upper horizontal element connectedbetween the rear upright and the upper section of the intermediateupright.

2. The scaffold as set forth in claim l in which the front upright isshorter than the rear upright, the intermediate horizontal elementinterconnects the upper ends of the front upright and intermediatesection of the intermediate upright, and the upper horizontal elementinterconnects the upper ends of the rear upright and the upper sectionof the intermediate upright.

References Cited in the tile of this patent UNTED STATES PATENTS D.128,057 Roney et al. July 1, 1941 1,279,299 Dubrau Sept. 17, 19182,478,088 Causey Aug. 2, 1949 2,631,900 Simpson Mar. 17, 1953 FOREIGNPATENTS 629,776 France Aug. 2, 1927

